package com.gong.yuanma.lock;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 * @author GongChang
 * @version 1.0
 * @date 2021/6/21 0021 20:46
 */
class Resource{
    private int number = 1;
    private Lock lock = new ReentrantLock();
    private Condition c1 = lock.newCondition();
    private Condition c2 = lock.newCondition();
    private Condition c3 = lock.newCondition();

    public void print5(){
        lock.lock();
        try{
            //判断
            while (number != 1){
                c1.await();
            }
            //干活
            for (int i = 0; i < 5; i++) {
                System.out.println(Thread.currentThread().getName()+"\t"+i);
            }
            //通知
            number = 2;
            c2.signal();

        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }

    public void print10(){
        lock.lock();
        try{
            //判断
            while (number != 2){
                c2.await();
            }
            //干活
            for (int i = 0; i < 10; i++) {
                System.out.println(Thread.currentThread().getName()+"\t"+i);
            }
            //通知
            number = 3;
            c3.signal();

        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }

    public void print15(){
        lock.lock();
        try{
            //判断
            while (number != 3){
                c3.await();
            }
            //干活
            for (int i = 0; i < 15; i++) {
                System.out.println(Thread.currentThread().getName()+"\t"+i);
            }
            //通知
            number = 1;
            c1.signal();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }

}

public class ReentrantLockDemo {
    public static void main(String[] args) {
        Resource resource = new Resource();

        new Thread(()->{
            for (int i = 0; i < 10; i++) {
                resource.print5();
            }
        },"aa").start();

        new Thread(()->{
            for (int i = 0; i < 10; i++) {
                resource.print10();
            }
        },"bb").start();

        new Thread(()->{
            for (int i = 0; i < 10; i++) {
                resource.print15();
            }
        },"cc").start();
    }
}
